Method of making manganese-steel stamp-shoes.



P. A. HAUGHTON. METHOD OF MAKING MANGANESE STEEL STAMP SHOES; APPLICATION FILED 00T.19, 1911.

I 1,033,800. Patented July 30, 1912.

ill

ouirnn STATES PATENT, orricn.

FRANK A. HA'UGH'IOIN, or HIGH BRIDGE, "NEW JERSEY.

' METHOD'OF MAKING MANGANESE- STEEL STAMP-SHOES.

To all whom it may concern."

Be it known that I, FRANK A. HAUGHTON,

a subject of the King of Great Britain, re-

siding at, High Bridge, in the county of Hunterdon and State of New Jersey, have invented certain new and useful Improvements in Methods of Making Manganese- Steel Stamp-Shoes, ofwhich the following is a specification.

This invention relates to method of heat treating manganese steel stamp shoes, the object of the invention being to provide an improved stamp shoe which will embody all the good wearing qualities of manganese steel for crushing-purposes and at the same time have the requisite degree of toughness at the point of juncture between the shank and the body thereof.

In the drawing accompanying and ing part ofthis specification,-Figure trates a stamp shoe made in, the manner set forth; and Fig. 2 illustrates the manner in which the same is treated.

Similar characters of reference indicate corresponding parts in the figures of the drawing.

form'- Stamp" shoes as usually made are so brittle 'terior and at times extending to the outer surface, so that the shoe is defective and incapable of performing the work for which it was designed, It is, however, essential that the metal adjacent to the point of juncture of the shoe body and its shank be toughened, so thatthere will be'no dan-' ger of the shank being broken from the body {thy the severe shocks which it receives in service, and I have discovered that by ,heating the, shoe to the usual tem erature to which manganese steel is heate as for"instance about an orange heat, and immersing the shoe, shank downward, until the portionv of the body immediately adjacent to the shank is submerged about an inch and a half and allowed to remain in that state until the entire shoe is cold the shank and the por'tio n Specification of Letters Patent. Application filed October 19, 1911. Serial No. 655,491..

1 illus- 'nese steel stamp shoes Patented July 30,1912.

of the body adjacent thereto is toughened, while no shrinkage cracks develop in the body of theshoe. By this'process I obtain 'a-stamp shoe which embodies all the good wearing qualities of manganese steel for crushing purposes,.and' at the same time obtain the requisite degree of toughness in the shank and in the body of the shoe adjoining such shank.

In manufacturing stamp; shoes in the manner set forth, after the shoe is cast it is heated to the-desired temperature and then immersed and supported by any suitable means, as 2,'in a quenching bath, as 3, sufficiently to immerse the shank 4 and aportion of the hez'fd 5 adjoining such shank, and

there allowed to remain until the entire shoe is cold,-whereupon it is removed. By this process it has been found, as hereinbefore stated, that the shank and that portion of the body adjacent thereto is thoroughly toughened, and that'no shrinkage cracks develop in. the body of the shoe, while the-remaining portion of the body is sufficiently tough to fulfil all the requirements of a' stamp shoe; w

I claim as my invention:-

L The method of nese steel stamp shoes comprising a body and shank-which consists in heating and then immersing a part of the shoe in a quenching bath, with the, shank thereof downward, to a point beyond the juncture point of the body and the shank and allowing the same to 0001.. I s

2. The method of heat treating manganese steel stamp shoes comprising a body and shank which consists in heating and then immersing apart of the shoe in a quenching bat-h, w1th the shank thereof downward, to a point beyond the'juncture point of the body and the shank and allowlng the same while so immersed to cool.

j 3. The method of heat treating cast manganese steel stamp shoes, comprising a body and a shank, which consists in heating it up to a substantially orange heat, and'then immersingit in a quenching bath, with the shank thereof downward, to a point beyond the juncture point of the shank and-the body so that the entire shank and a portion of the body will be' immersed in such bath and while so immersed allowing it to become cool.- I

rThe method of heat-treating mangacomprising a body.

heat treating manga- Y p, int slightly-beyond the juncture point of and shank, yvhieh consists in heating the goint be 0nd the juncture point of such same and then' rapidly cooling that part ofody an shank and allowing the same to the shoe comprising the shank and body to a cool.

such shank andvbody.

day of October, 1911. 5. The method of heat-treating .manganese steel stamp shoes comprising a body FRANK HAUGHTON' and shank, which consists m heating the Witnesses; same and then immersing in a uenching E. B. Case, 7 bath the shank and apart of, the ody to a H. W. WYcnoFF.

Copies of this patent may be pbtained for flve cents each, by addressing the Commissioner 0! Patents, Washington, 1). G.

Signed at High Bridge, N. J.,' this 13t 

